1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
//
// "$Id$"
//
// Subclassing Fl_Surface_Device and Fl_Graphics_Driver in the Fast Light Tool Kit (FLTK).
//
// Copyright 2018 by Bill Spitzak and others.
//
// This library is free software. Distribution and use rights are outlined in
// the file "COPYING" which should have been included with this file. If this
// file is missing or damaged, see the license at:
//
// http://www.fltk.org/COPYING.php
//
// Please report all bugs and problems on the following page:
//
// http://www.fltk.org/str.php
//
// Partial, working implementation of how to draw into an SVG file using the standard
// FLTK drawing API.
// File hello.svg is created in the current directory.
#include <FL/fl_draw.H>
#include <stdio.h>
#include <FL/Fl_Device.H>
#include <FL/Fl_Graphics_Driver.H>
#include <FL/Fl.H>
#include <FL/Fl_Window.H>
#include <FL/Fl_Box.H>
class SVG_Graphics_Driver : public Fl_Graphics_Driver {
FILE *out_;
int width_;
const char *linecap_;
uchar red_, green_, blue_;
public:
SVG_Graphics_Driver(FILE*);
~SVG_Graphics_Driver();
FILE* file() {return out_;}
protected:
const char *family_;
const char *bold_;
const char *style_;
void rect(int x, int y, int w, int h);
void rectf(int x, int y, int w, int h);
void line_style(int style, int width, char *dashes=0);
void line(int x1, int y1, int x2, int y2);
void font_(int f, int s);
void font(int f, int s);
void draw(const char *str, int n, int x, int y);
void draw(const char*, int, float, float) ;
void draw(int, const char*, int, int, int) ;
void color(uchar r, uchar g, uchar b);
void color(Fl_Color c);
double width(const char*, int) ;
int height() ;
int descent() ;
};
class SVG_File_Surface : public Fl_Surface_Device {
int width_, height_;
public:
SVG_File_Surface(int width, int height, FILE*);
int width() { return width_; }
int height() { return height_; }
~SVG_File_Surface();
};
SVG_Graphics_Driver::SVG_Graphics_Driver(FILE *f) {
out_ = f;
width_ = 1;
linecap_ = "butt";
family_ = "";
bold_ = "";
style_ = "";
red_ = green_ = blue_ = 0;
}
SVG_Graphics_Driver::~SVG_Graphics_Driver()
{
}
void SVG_Graphics_Driver::rect(int x, int y, int w, int h) {
fprintf(out_, "<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" "
"fill=\"none\" stroke=\"rgb(%u,%u,%u)\" stroke-width=\"%d\"/>\n", x, y, w, h, red_, green_, blue_, width_);
}
void SVG_Graphics_Driver::rectf(int x, int y, int w, int h) {
fprintf(out_, "<rect x=\"%d\" y=\"%d\" width=\"%d\" height=\"%d\" "
"fill=\"rgb(%u,%u,%u)\" />\n", x, y, w, h, red_, green_, blue_);
}
void SVG_Graphics_Driver::line(int x1, int y1, int x2, int y2) {
fprintf(out_,
"<line x1=\"%d\" y1=\"%d\" x2=\"%d\" y2=\"%d\" "
"style=\"stroke:rgb(%u,%u,%u);stroke-width:%d;stroke-linecap:%s\" />\n",
x1,y1,x2,y2, red_, green_, blue_, width_, linecap_);
}
void SVG_Graphics_Driver::font_(int ft, int s) {
Fl_Graphics_Driver::font(ft, s);
int famnum = ft/4;
if (famnum == 0) family_ = "Helvetica";
else if (famnum == 1) family_ = "Courier";
else family_ = "Times";
int modulo = ft % 4;
int use_bold = modulo == 1 || modulo == 3;
int use_italic = modulo >= 2;
bold_ = ( use_bold ? " font-weight=\"bold\"" : "" );
style_ = ( use_italic ? " font-style=\"italic\"" : "" );
if (use_italic && famnum != 2) style_ = " font-style=\"oblique\"";
}
void SVG_Graphics_Driver::font(int ft, int s) {
Fl_Display_Device::display_device()->driver()->font(ft, s);
font_(ft, s);
}
void SVG_Graphics_Driver::line_style(int style, int width, char *dashes) {
if (width == 0) width = 1;
width_ = width;
if (style & FL_CAP_SQUARE) linecap_ = "square";
if (style & FL_CAP_ROUND) linecap_ = "round";
else linecap_ = "butt";
}
void SVG_Graphics_Driver::draw(const char *str, int n, int x, int y) {
// Caution: Internet Explorer ignores the xml:space="preserve" attribute
// work-around: replace all spaces by no-break space = U+00A0 = 0xC2-0xA0 (UTF-8) before sending to IE
fprintf(out_, "<text x=\"%d\" y=\"%d\" font-family=\"%s\"%s%s font-size=\"%d\" "
"xml:space=\"preserve\" "
" fill=\"rgb(%u,%u,%u)\" textLength=\"%d\">%.*s</text>\n",x, y, family_, bold_, style_, size(), red_, green_, blue_, (int)width(str, n), n, str);
}
void SVG_Graphics_Driver::draw(const char* str, int n, float fx, float fy) {
return draw(str, n, (int)fx, (int)fy);
}
void SVG_Graphics_Driver::draw(int angle, const char* str, int n, int x, int y) {
fprintf(out_, "<g transform=\"translate(%d,%d) rotate(%d)\">", x, y, -angle);
draw(str, n, 0, 0);
fputs("</g>\n", out_);
}
void SVG_Graphics_Driver::color(Fl_Color c) {
Fl_Graphics_Driver::color(c);
Fl::get_color(c, red_, green_, blue_);
}
void SVG_Graphics_Driver::color(uchar r, uchar g, uchar b) {
red_ = r;
green_ = g;
blue_ = b;
}
double SVG_Graphics_Driver::width(const char* str, int l) {
return Fl_Display_Device::display_device()->driver()->width(str, l);
}
int SVG_Graphics_Driver::height() {
return Fl_Display_Device::display_device()->driver()->height();
}
int SVG_Graphics_Driver::descent() {
return Fl_Display_Device::display_device()->driver()->descent();
}
SVG_File_Surface::SVG_File_Surface(int w, int h, FILE *f) : Fl_Surface_Device(NULL) {
fprintf(f,
"<?xml version=\"1.0\" encoding=\"utf-8\" standalone=\"no\"?>\n"
"<!DOCTYPE svg PUBLIC \"-//W3C//DTD SVG 1.1//EN\" \n"
"\"http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd\">\n"
"<svg width=\"%dpx\" height=\"%dpx\" viewBox=\"0 0 %d %d\"\n"
"xmlns=\"http://www.w3.org/2000/svg\" version=\"1.1\">\n", w, h, w, h);
width_ = w; height_ = h;
driver(new SVG_Graphics_Driver(f));
}
SVG_File_Surface::~SVG_File_Surface() {
SVG_Graphics_Driver *driver = (SVG_Graphics_Driver*)this->driver();
fputs("</svg>\n", driver->file());
fflush(driver->file());
delete driver;
}
int main(int argc, char **argv) {
Fl_Window *window = new Fl_Window(340,180);
Fl_Box *box = new Fl_Box(20,40,300,100,"Hello, World!");
box->box(FL_UP_BOX);
box->labelfont(FL_BOLD+FL_ITALIC);
box->labelsize(36);
box->labeltype(FL_SHADOW_LABEL);
window->end();
window->show(argc, argv);
FILE *out = fl_fopen("hello.svg", "w");
if (out) {
SVG_File_Surface *svg = new SVG_File_Surface(box->w(), box->h(), out);
Fl_Surface_Device::push_current(svg);
fl_color(box->color());
fl_rectf(0, 0, box->w(), box->h());
fl_font(box->labelfont(), 36);
fl_color(box->labelcolor());
fl_draw(box->label(), 5, 50);
Fl_Surface_Device::pop_current();
delete svg;
fclose(out);
}
return Fl::run();
}
//
// End of "$Id$".
//
|
